CVE-2022-4137 : Vulnerability Insights and Analysis
Learn about CVE-2022-4137, a reflected cross-site scripting (XSS) vulnerability in the 'oob' OAuth endpoint affecting Keycloak and Red Hat Single Sign-On 7. Find out the impact, affected systems, and mitigation steps.
A detailed guide on CVE-2022-4137, a reflected cross-site scripting (XSS) vulnerability found in 'oob' OAuth endpoint, impacting Keycloak and Red Hat Single Sign-On 7.
Understanding CVE-2022-4137
This section dives into the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2022-4137?
CVE-2022-4137 is a reflected cross-site scripting (XSS) vulnerability discovered in the 'oob' OAuth endpoint due to incorrect null-byte handling. Attackers can insert arbitrary URIs into a Keycloak error page by tricking a user or administrator into interacting with a malicious link.
The Impact of CVE-2022-4137
The vulnerability may compromise user details, enabling attackers to modify or gather sensitive information, putting user data at risk.
Technical Details of CVE-2022-4137
This section elaborates on the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
Affects Keycloak and Red Hat Single Sign-On 7, allowing attackers to execute XSS attacks through crafted URIs, exploiting incorrect null-byte handling.
Affected Systems and Versions
- Keycloak: Vulnerable due to the XSS flaw in the 'oob' OAuth endpoint.
- Red Hat Single Sign-On 7: Various versions are impacted, including Red Hat Single Sign-On 7.6 for RHEL 7, 8, and 9.
Exploitation Mechanism
The vulnerability requires user interaction with a malicious link, leveraging incorrect null-byte handling to inject arbitrary URIs.
Mitigation and Prevention
Explore essential steps to secure your systems and prevent exploitation.
Immediate Steps to Take
- Update Keycloak and Red Hat Single Sign-On 7 to patched versions.
- Educate users and administrators about phishing techniques and suspicious links.
Long-Term Security Practices
- Regular security training for users and administrators.
- Implement Content Security Policy (CSP) to mitigate XSS risks.
Patching and Updates
Apply the latest patches and updates provided by Red Hat to address the CVE-2022-4137 vulnerability.